Robert m



(No Model.)

R. 1V1. 00X 8v T. B. KEIM.

CHAIR.

No. 461,238. Patented Oct. 13,1891.

FIG/.1.

- UNITED STATES PATENT OFFICE.

ROBERT M. COX, OF PHILADELPHIA, AND THOMAS BEVERLEY KEIM, OF READING, PENNSYLVANIA; SAID KEIM ASSIGNOR TO SAID COX.

CHAIR.

SPECIFICATION forming part of Letters Patent No. 461,238, dated October 13, 1891. Appiicaion filed August 14,1891. serai No. 402.626. (No ms.)

To a/ZZ whom, t may concern:

Be it known that we, ROBERT M. COX, a resident of Philadelphia, Pennsylvania, and THOMAS BEVERLEY KEIM, a resident of Reading, Pennsylvania, both citizens of the United States, have invented certain Improvements in Chairs, of which the following is a specification.

The object of our invention is to provide a chair for use on shipboard, in which the seat can be rotated on its standard or be rigidly secured thereto, or the parts can be so adjusted that they may be readily turned by the occupant, but prevented from turningby accident.

In theaccompanying drawings, Figure 1 is a vertical section of our improved chair. Fig. 2 is asection on the line 1 2, Fig. l. Fig. 3 isa perspective view of the seat-carrier, and Fig. 4 is a perspective view showing the clamping-wedges detached.

Inchairs for use on ships it is desirable to have'them revolve, but at the same time to prevent them from accidentally revolving while the ship is lurching. By applying sufficient friction between the base and the seatcarrier the chair can be revolved by the person occupying it but it will not revolve accidentally.

Referring to Fig. l, A is the base of the chair, which is secured to the floor in any suitable manner, and has a hollow standard B;

Adapted to this standard is a seat-carrierD, slotted at d cl for the reception of the wedges E E.- In the present instance two wedges are used'and arranged opposite each other. These wedges are pivoted to lugs d on the interior of the carrier D and bear against the inner surface of the standard B, as clearly shown'in Fig. 1.

Adapted to the interior of the carrier D is a wedge-shaped block F,(clearly shown in Fig. 4,) having inclined waysf f, adapted to the backs of the wedges E E, as shown in Fig. 1. This-block is preferably provided with guiding anges f for the wedges. Connected to the block is ahead G, having a screw g; which passes up through a nut H. This nut has a suitable handle h by which it is turned, and is locked as regards vertical motion by a setstandard for repairs or for cleaning, leaving simply the base and standard.

The person using the chair can adjust the seat by simply passing the hand under the seat and operating the handled nut, putting more or less friction between the parts, as desired.

IVe claim as our inventionl. The combination, in a revolving chair, of the hollow standard, the seat-carrier, Wedges carried bythe seat-carrier, and a block adapted to operate the wedges, with mechanism for moving said block, substantially as described.

2. The combination of the hollow standard, the seat-carrier adapted thereto, wedges pivoted to said seat-carrier, a vertically-movable block acting on said wedges, a screw connected f to said block, and a nut on the seat-carrier engaging with the screw, whereby on the turning of the nut the wedges will be moved against or Withdrawn from the standard, substantially as described.

3. The combination of the hollow standard, the seat-carrier, wedges pivoted thereto and adapted to bear upon the interior of the standard, a wedge-block, a screw secured thereto,

a handled nut adapted to said screw, and a s seat-frame, with pins on said seat-frame confining the nut against vertical movement, sub\ 9o stantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ROBT. M. COX. 4 THOMAS BEVERLEY KEIM.

Witnesses:

A. K. STAUFFER, E. B. MICGAND. 

